Flash light



March 21, 1933. P. ROSENBERG FLASH LIGHT File Dec. 1930 I 2-Sheets-Sheet 1 ((llllllllllllllllllmm W 3 /n venfor:

March 21, 1933.

Filed Dec. 4, 1930 'llll' P. ROSENBERG FLASH LIGHT 2 Sheets-Sheet 9 /n venfon:

f atent ed Mar. 21, I933 PAUL Rosanna-me, or BERLIN/GERMANY, AssIquoB; TO WALTER aosnusnn or BERL N, PANKOW,;GERMANY rnasir' men'r Application filed December e, 1930,;Seria1 No. 500,113, and in Germany March 11', '1929.

My inventionrelates to flash lightshaving a source of light which is adapted to be adjusted with respect to its reflector, and it is an object of'my invention to improve a flash light of this type. V.

To'this end I provide a forked lever-which is mounted to rock in the casing of the lamp with its arms surrounding, and operatively; connected to, the source of light, and manually operated means for rocking the lever By providing a forked lever as described I eliminate edging of the lever which may ocour in one-sided plain levers, and the edging may be further counteracted by making the lever resilient. l I 1 l A flash light accordingto my invention is simple, cheap and veryrugged so that the adjusting mechanismmay be ,relied 'on to 1 function even under veryroughhandling;

In a preferred embodiment of myv inven-' tion- I provide the usual resilient tubular guide for the source 'of'light in which it is--. mounted to slide against some friction, and arrange this guidetogether with'the rocking lever and the contacting means for connec tion with the battery, on an insulating or insulated plate inthe casing. 'VThe adjusting mechanism is thus concealed within the cas ing and will not be interferedwith if'the casing is damaged.) In consequence, the wall of the casing may be made much thinner than in casings where the casing itself is theguide, orthe guide extends along one wall-'- of the casing. The reduced wall thickness is important in a cheap article like a flash light.

By adjusting the source of light with re; spect to its reflector, I- may obtain a divergent, parallel, or convergent beam. By my improved adjusting mechanism I efl 'ect, a very fine regulation within considerable. limits, and such regulation is maintained permanently on account oft-he simpleand Y rugged construction of the adjusting mecha nism. The resiliency of the rocking lever is another factor making for reliability under the severest 'conditions. j p

In the accompanying drawings flash lights embodying my invention are illustrated diagrammatically by way of example.

In the drawings about a shaft15 in the casing a so of the forked lever p. v resilient for the reasons stated.

Figal is a partly sectional elevation of-a flash light, a Fig.- 2 is a perspective illustration 'of its focussing' means, slightly modified, F ig. 3 is apartly sectional elevation of slightly .modified current-supplying means," Figs. 4, 5, and 6 illustrate. means forconstituting a bearing forthe manually operated lever-rocking means. Q s 2 Referring now to the'drawings, and first to Fig. 1, ais the casing of a flash light, 6 is its battery, 0 is its screw cap, with a spring, not shown, inserted'between the battery and thecap, d isathreaded sleeve seated on the plate 'e, and an annular washer f for holding the reflector vg,.and it is the source .of light. The source of light is here shown as a bulb in a threadedsleeve 21 in which it is-held by the usual threaded plug. The upper end of the sleeveis unthreaded at 2".

dis, aplate of insulating material whichreflector end of the casing a, with a glass is held;v in the casing by a split ring m in a croze. The plate may also be of conducting material, and'insulated. k is'a tubular guide on the plate Z in which thesleeve 2,2" is fitted to slide, and held by friction. The guide is slotted at opposite sides for the-reception of two pins 8 on the sleeve 2'. Anymore slots may be provided in the guide, if desired. 7

n is a. bearing block on theplate [which may be of channel section, 0 is a pivotin the block, and p is a forkedlever mounted to rock on the pin 0. The two arms of the forked lever psurround the guide lie-and are equipped with hooks g for engaging the pins 8. r The hook g which is shown is obviously duplicated onthe opposite'side of the guide is. risa hand wheelwhich is mounted to rotate as to partly project from the casing,

with its projecting portion knurled, and the portion within the I casingslotted for the reception of the end The lever 10 may be Themea ns for supplying current'to the bulb i include a pin t on the sleeve 2', abentup strip u'which engages the pin it, a hollow rivet o for-hol'ding thestrip u by its one end,

and'making contact at the battery by its other end, a contact strip w which is connected to the sleeve is, a contact spring m which extends to the strip to through a slot in the plate Z, and an insulating strip 3 to which the spring 00 is secured. The spring 09 makes contact with the other terminal of the battery b, under the control of a push-button a.

If the push button a is operated in the usual manner the insulating strip y brings the spring 50 to bear onthe outer end of the strip w, as shown in Fig. 1, and the following circuit is established: Carbon terminal of battery Z), hollow rivet o, springs u, pin t, filament of bulb h, sleeve 11, 11, guide It, strip '21], spring :70, and zinc terminal of battery 6.

Fig. 2'illust-rates a modified type of adjusting mechanism on the plate Z, corresponding parts being marked with the same reference letters as in Fig. 1. The bearing block at is here shown asa substantially U-shaped frame with the pivot 0 atone end, and vertical slots for the reception of the pins 8- on the sleeve 2', i. The pins engage in slots in the arms of the forked lever p. The hand wheel 1 is equipped with pins 1" at'its inner end which engage in slots p in the arms of the lever 10.

The contacting means are somwhat modified. The hollow member '1) which is here 1 shown with a threaded end 41 inserted in the plate 1, and held by a nut '0 has a central bore a in which the split end 25 of the pin t is mounted to slide.

it will be understood that the plate Z with the parts mounted thereon is a self contained unit which is adapted to be inserted" in a casing. This is particularly advantageous for progressive manufacture. The plate also acts as a bracing member for the casing as its edge engages the wall of the casing throughout, and asa partition for the battery and lamp chambers.

-Referring now to Figs. 4: to 6, this lamp is designed like the one shown in Fig. 1 but J with the plate Z as shown in Fig. 2, and corresponding parts' are marked with the same reference letters.

Connected to the reflector sleeve 03 by a taper 11 is a tube 12 which fits the upper end" of the casing a and is equipped with a groove" 11 and two slots 13, ii at right angles to each other." 16 is a short croze in the wall of the casing a which together with the groove 11 forms abearing for the shaft 15 of the hand wheel 7. The casing is slotted at 13' for the reception of the hand wheel 1". The

width of the slot 13' is equal to that of the longitudinal slot 13 in the tube 12, and'the length of the transverse slot 1 1 is about equal to the length of the shaft15. The slot 13 intersects the croze 16 at its centre.

- To assemble theparts the shaft-15 is placed in thecroze 16, with the slot 14; in the tube- 12- registering with the croze 16, and the tube;

is then pushed home until the groove 11 reg-- isters with the croze 16.

' It will be understood that the means for supporting the hand wheel 7 and its shaft 15, are extremely simple and most readily assembled.

I claim:

1. In a flash light having a casing, a reflector, and a source of light mounted to be adjusted with respect to said reflector, a battery in said casing, a plate of insulating material in said casing intermediate said battery and said source of light, a guide of channel section on said plate having slots, 2. socket for said source of light, pins on said socket adapted to move in said slots, a forked rocking said lever, a battery insaid casing,

a fixed contact sleeve connected to said battery, and a plug contact connected to said socket and adapted to fit said sleeve.

3. In a flashlight having a casing, a reflector, and a source of light mounted to be adjusted with respect to said reflector, a socket for said source of light, a forked lever mounted; to rock in said casing with its arms surrounding and operatively connected to said source of light, a shaft, a hand wheel on said shaft operatively connected to said lever, a sleeve adapted to be inserted in said casing and having a groove for the reception of said shaft," and slots for said shaft and said hand wheel topass through, and a bearing member on said casing adapted to make up a com- 1 plete bearing for said shaft with said groove in said sleeve.

4. In'a'flash light having a casing, a reflector, and a source of light mounted to be adjusted with respect to said'reflector, a battery in said casing, a plate of insulating ma terial in said casing intermediate said battery and said source of light, a guide on said plate having slots, a socket for said source of light, pins on said socket adapted to movein said slots, a forked lever mounted to rock on said plate, with its arms surrounding said socket and engaging said pins, and manually'operated means for rocking said lever. I

In testimony whereof I have aflixed my signature.

. PAUL nosn vnnno. 

